I'd be interested in them. If anything those tubes are cool for making tap handles out of. I guess if you use a calculator it would tell you the viability is 0% of course. I recently got a packet of white labs from 2015 at Friar Tuck, made a starter, used some yeast nutrient, it took about a week but the yeast did come back to good health! This is different though as those tubes are 10+ years old.